While I'm aware some would call this a rather contrarian opinion, I truly believe that if you're in a salaried position and routinely required to work 45 or more hours a week, whether by actual mandate or "but that's just what we all do here" cultural pressure, there is something wrong with that company, more than likely starting at the top. Many companies have extraordinary crunch periods for one reason or another, and that's fine, but if you're in a crunch period more often than you aren't, that's no longer extraordinary.